TABLE 1.
Propella and inlet water quality during the spiking experiments
| Test | Mean ± SD (no. of observations)a
|
||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Propella water
|
Inlet water
|
||||||||||||||
| Flow velocity (m/s)
|
Total phosphorus (μg/liter)
|
Temp (°C)
|
pH | EC (μS/cm) | Chlorine (mg/liter) | TOC (mg/liter) | AOC (μg acetate eq. C/liter) | Total phosphorus (μg/liter) | MAP (μg PO4-P/liter) | HPC bacteria (CFU/ml) | Total bacteria (cells/ml) | ||||
| A | B | A | B | A | B | ||||||||||
| Flow velocity | 0.10 ± 0.00 (12) | 0.24 ± 0.00 (12) | ND | ND | 15.6 ± 2.0 (7) | 16.2 ± 1.4 (5) | 8.0 ± 0.1 (5) | 201 ± 23 (5) | 0.17 ± 0.01 (4) | 2.8 ± 0.2 (5) | 71 ± 15 (5) | 3.0 ± 1.8 (5) | 0.20 ± 0.13 (5) | 5.1 × 103 ± 9.0 × 102 (5) | 1.5 × 105 ± 3.0 × 104 (5) |
| Phosphorus | 0.24 ± 0.00 (16) | 0.24 ± 0.00 (13) | 4.2 ± 0.9 (5) | 13.8 ± 3.2 (5) | 14.8 ± 0.8 (16) | 15.0 ± 0.9 (15) | 7.9 ± 0.2 (5) | 189 ± 8 (5) | 0.15 ± 0.06 (5) | 2.8 ± 0.2 (5) | 106 ± 79 (5) | 3.9 ± 0.6 (5) | 0.18 ± 0.09 (5) | 4.3 × 102 ± 4.3 × 102 (5) | 7.1 × 104 ± 2.6 × 104 (5) |
| Temp | 0.25 ± 0.00 (9) | 0.25 ± 0.00 (9) | ND | ND | 7.0 ± 0.5 (14) | 20.0 ± 0.5 (14) | 7.8 ± 0.2 (5) | 194 ± 17 (5) | 0.17 ± 0.08 (5) | 3.5 ± 0.4 (5) | 55 ± 20 (5) | 7.8 ± 2.3 (5) | 0.26 ± 0.16 (5) | 1.6 × 103 ± 1.4 × 103 (5) | 1.8 × 105 ± 1.5 × 104 (5) |
a
EC, electrical conductivity; ND, not determined.